# Storing your pen

> In the fridge, at 2 to 8°C, say the Mounjaro, Wegovy and Ozempic leaflets; Zepbound’s label also allows its KwikPen at room temperature, up to 30°C, for up to 30 days. All four say never freeze it, or use a pen that has been frozen. Wegovy and Ozempic add keep it from the cooling element, with the cap on.

Canonical: https://jabwise.app/guides/storing-your-pen. Sources checked 12 October 2026. General information, not medical advice: follow your prescriber.

## In their own words

Where to keep each pen before it’s started, and what each says about freezing, quoted as written. How long a started one keeps is in how long a pen lasts.

- **Mounjaro**: Where to keep it: In a refrigerator, 2 to 8°C; Freezing: "Do not freeze. If the pen has been frozen, DO NOT USE." ([Mounjaro KwikPen patient leaflet](https://www.medicines.org.uk/emc/product/15481/pil))
- **Zepbound KwikPen**: Where to keep it: "Store multi-dose vial or single-patient-use KwikPen in the refrigerator between 36°F to 46°F (2°C to 8°C) or at room temperature [up to 86°F (30°C)]. Throw away the multi-dose vial or single-patient-use KwikPen after a total of 30 days at room temperature, 30 days after first use, or after taking 4 weekly doses, even if it still has medicine in it." ([Zepbound prescribing information](https://uspl.lilly.com/zepbound/zepbound.html)); Freezing: "Do not freeze ZEPBOUND. Do not use ZEPBOUND if frozen." ([Zepbound prescribing information](https://uspl.lilly.com/zepbound/zepbound.html))
- **Zepbound single-dose pen**: Where to keep it: "Store single-dose pen and single-dose vial in the refrigerator between 36°F to 46°F (2°C to 8°C). If needed, each single-dose pen or single-dose vial can be stored at room temperature up to 86°F (30°C) for up to a total of 21 days." ([Zepbound prescribing information](https://uspl.lilly.com/zepbound/zepbound.html)); Freezing: "Do not freeze ZEPBOUND. Do not use ZEPBOUND if frozen." ([Zepbound prescribing information](https://uspl.lilly.com/zepbound/zepbound.html))
- **Wegovy**: Where to keep it: "Store in a refrigerator (2°C to 8°C). Keep away from the cooling element." ([Wegovy FlexTouch patient leaflet](https://www.medicines.org.uk/emc/product/13800/pil)); Freezing: "Do not freeze wegovy® and do not use it if it has been frozen." ([Wegovy FlexTouch patient leaflet](https://www.medicines.org.uk/emc/product/13800/pil))
- **Ozempic**: Where to keep it: "Store in a refrigerator (2 °C–8 °C)." ([Ozempic patient leaflet](https://www.medicines.org.uk/emc/product/9748/pil)); Freezing: "Do not freeze Ozempic® and do not use it if it has been frozen." ([Ozempic patient leaflet](https://www.medicines.org.uk/emc/product/9748/pil))

## Also in the leaflets

- **Not by the cooling element**: Before first use, Wegovy and Ozempic say keep pens in the fridge, away from the cooling element, and never frozen.
- **Cap on**: Wegovy’s and Ozempic’s leaflets both say keep the pen cap on, in order to protect the medicine inside from light.
- **Cloudy or discoloured**: Before use, Mounjaro’s leaflet says don’t use it if the medicine is cloudy, discoloured or has any particles in it.
- **Not in the bin**: Not down the sink or in household waste: the UK leaflets say ask your pharmacist how to throw away medicines.

## Questions

### What if my pen was frozen?

All four say don’t use it. Zepbound’s label adds, for its single-dose pen, throw the pen away and use a new pen.

### Can a pen be out of the fridge once I’ve started it?

Yes, within each brand’s limit. Wegovy and Ozempic say up to 6 weeks below 30°C or in the fridge; Mounjaro says unrefrigerated, not above 30°C, for up to 30 days after first use; Zepbound’s KwikPen, a total of 30 days at room temperature, 30 days after first use, or 4 weekly doses, whichever comes first.

### Do I need to warm it up before injecting?

Zepbound’s label says, for its single-dose pen, it is not necessary to warm the pen to room temperature. The other leaflets don’t say.

## In Jabwise: Supply

Jabwise nudges you before the fridge runs empty. Set when your next order is due and how often it repeats, and Jabwise reminds you on the day or up to 14 days before.

## Getting real advice

- **A pharmacist, your doctor or NHS 111**: If you’re not sure how to use your medicine, or a side effect bothers you or won’t go away. NHS 111 if you think you might be having serious side effects, or you’ve used too much. [NHS: Semaglutide](https://www.nhs.uk/medicines/semaglutide/), [NHS: Tirzepatide](https://www.nhs.uk/medicines/tirzepatide/), [NHS 111 online](https://111.nhs.uk/)
- **Report a side effect**: Anyone can, not only doctors. [Yellow Card (UK)](https://yellowcard.mhra.gov.uk/), [MedWatch (US)](https://www.fda.gov/safety/medwatch-fda-safety-information-and-adverse-event-reporting-program)

## Sources

- [Mounjaro KwikPen patient leaflet](https://www.medicines.org.uk/emc/product/15481/pil)
- [Zepbound prescribing information](https://uspl.lilly.com/zepbound/zepbound.html)
- [Wegovy FlexTouch patient leaflet](https://www.medicines.org.uk/emc/product/13800/pil)
- [Ozempic patient leaflet](https://www.medicines.org.uk/emc/product/9748/pil)